/*
 * The MIT License
 * 
 * Copyright (c) 2011 Takahiro Hashimoto
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.taobao.top.link.embedded.websocket.handler;

import java.nio.ByteBuffer;

import com.taobao.top.link.embedded.websocket.WebSocket;
import com.taobao.top.link.embedded.websocket.exception.WebSocketException;
import com.taobao.top.link.embedded.websocket.frame.Frame;
import com.taobao.top.link.embedded.websocket.handshake.SSLHandshake;

/**
 * The Class SSLStreamHandler.
 *
 * @author Takahiro Hashimoto
 */
public class SSLStreamHandler implements StreamHandler {

  /** The log. */
  // private static Logger log =
  // Logger.getLogger(SSLStreamHandler.class.getName());

  /** The ssl upstream buffer. */
  private ByteBuffer   sslUpstreamBuffer;

  /** The ssl downstream buffer. */
  private ByteBuffer   sslDownstreamBuffer;

  /** The handshake. */
  private SSLHandshake handshake;

  /**
   * Instantiates a new sSL stream handler.
   *
   * @param handshake
   *          the handshake
   * @param bufferSize
   *          the buffer size
   * @throws WebSocketException
   *           the web socket exception
   */
  public SSLStreamHandler(SSLHandshake handshake, int bufferSize) throws WebSocketException {
    this.handshake = handshake;
    this.sslUpstreamBuffer = ByteBuffer.allocate(bufferSize);
    this.sslDownstreamBuffer = ByteBuffer.allocate(bufferSize);
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * jp.a840.websocket.handler.StreamHandler#nextHandshakeUpstreamHandler(jp.
   * a840.websocket.WebSocket, java.nio.ByteBuffer,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextHandshakeUpstreamHandler(WebSocket ws, ByteBuffer buffer, StreamHandlerChain chain) throws WebSocketException {
    handshake.wrap(buffer, sslUpstreamBuffer);
    chain.nextHandshakeUpstreamHandler(ws, sslUpstreamBuffer);
  }

  /*
   * (non-Javadoc)
   * 
   * @see
   * jp.a840.websocket.handler.StreamHandler#nextHandshakeDownstreamHandler(jp
   * .a840.websocket.WebSocket, java.nio.ByteBuffer,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextHandshakeDownstreamHandler(WebSocket ws, ByteBuffer buffer, StreamHandlerChain chain) throws WebSocketException {
    handshake.unwrap(buffer, sslDownstreamBuffer);
    chain.nextHandshakeDownstreamHandler(ws, sslDownstreamBuffer);
  }

  /*
   * (non-Javadoc)
   * 
   * @see jp.a840.websocket.handler.StreamHandler#nextUpstreamHandler(jp.a840.
   * websocket.WebSocket, java.nio.ByteBuffer, jp.a840.websocket.frame.Frame,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextUpstreamHandler(WebSocket ws, ByteBuffer buffer, Frame frame, StreamHandlerChain chain) throws WebSocketException {
    handshake.wrap(buffer, sslUpstreamBuffer);
    chain.nextUpstreamHandler(ws, sslUpstreamBuffer, frame);
  }

  /*
   * (non-Javadoc)
   * 
   * @see jp.a840.websocket.handler.StreamHandler#nextDownstreamHandler(jp.a840.
   * websocket.WebSocket, java.nio.ByteBuffer, jp.a840.websocket.frame.Frame,
   * jp.a840.websocket.handler.StreamHandlerChain)
   */
  public void nextDownstreamHandler(WebSocket ws, ByteBuffer buffer, Frame frame, StreamHandlerChain chain) throws WebSocketException {
    handshake.unwrap(buffer, sslDownstreamBuffer);
    chain.nextDownstreamHandler(ws, sslDownstreamBuffer, frame);
  }

}
